1#!/usr/bin/env bash 2# 3# Test COW from backing files 4# 5# Copyright (C) 2012 Red Hat, Inc. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21# creator 22owner=kwolf@redhat.com 23 24seq=`basename $0` 25echo "QA output created by $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32} 33trap "_cleanup; exit \$status" 0 1 2 3 15 34 35# get standard environment, filters and checks 36. ./common.rc 37. ./common.filter 38 39_supported_fmt qcow qcow2 vmdk qed 40_supported_proto file 41_unsupported_imgopts "subformat=monolithicFlat" \ 42 "subformat=twoGbMaxExtentFlat" \ 43 "subformat=twoGbMaxExtentSparse" 44 45CLUSTER_SIZE=4k 46size=128M 47 48echo 49echo "== creating backing file for COW tests ==" 50 51TEST_IMG_SAVE="$TEST_IMG" 52TEST_IMG="$TEST_IMG.base" 53 54_make_test_img $size 55 56backing_io() 57{ 58 local offset=$1 59 local sectors=$2 60 local op=$3 61 local pattern=0 62 local cur_sec=0 63 64 for i in $(seq 0 $((sectors - 1))); do 65 cur_sec=$((offset / 512 + i)) 66 pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 )) 67 68 echo "$op -P $pattern $((cur_sec * 512)) 512" 69 done 70} 71 72backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 73 74TEST_IMG="$TEST_IMG_SAVE" 75 76_make_test_img -b "$TEST_IMG.base" 6G 77 78echo 79echo "== COW in a single cluster ==" 80$QEMU_IO -c "write -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io 81$QEMU_IO -c "write -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io 82$QEMU_IO -c "write -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io 83 84$QEMU_IO -c "read -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io 85backing_io $((2 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 86$QEMU_IO -c "read -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io 87backing_io $((8 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 88$QEMU_IO -c "read -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io 89backing_io $((11 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 90 91echo 92echo "== COW in two-cluster allocations ==" 93$QEMU_IO -c "write -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io 94$QEMU_IO -c "write -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io 95$QEMU_IO -c "write -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io 96 97$QEMU_IO -c "read -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io 98backing_io $((22 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 99$QEMU_IO -c "read -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io 100backing_io $((32 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 101$QEMU_IO -c "read -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io 102backing_io $((38 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 103 104echo 105echo "== COW in multi-cluster allocations ==" 106$QEMU_IO -c "write -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io 107$QEMU_IO -c "write -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io 108$QEMU_IO -c "write -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io 109 110$QEMU_IO -c "read -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io 111backing_io $((63 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 112$QEMU_IO -c "read -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io 113backing_io $((80 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 114$QEMU_IO -c "read -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io 115backing_io $((98 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 116 117_check_test_img 118 119# success, all done 120echo "*** done" 121rm -f $seq.full 122status=0 123